Adding a test for the automatic mediaflux session reconnect (#711)

* Adding a test for the automatic mediaflux session reconnect
This code is int he application controller, so it will work for all controller actions

* Update mediaflux_session_spec.rb

---------

Co-authored-by: Bess Sadler <[email protected]>

spec/system/mediaflux_session_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+# Makes sure the Application Controller handles Mediaflux::Http::SessionExpired in a test from the user's perspective
+#
+RSpec.describe "Mediaflux Sessions", type: :system do
+  let(:sponsor_user) { FactoryBot.create(:project_sponsor, uid: "pul123") }
+  let(:project) { FactoryBot.create(:project, mediaflux_id: "abc123") }
+
+  before do
+    sign_in sponsor_user
+  end
+
+  it "reconnects to mediaflux after the session ends", connect_to_mediaflux: true do
+    original_session = sponsor_user.mediaflux_session
+
+    # logout the session so we get an error and need to reset the session
+    Mediaflux::Http::LogoutRequest.new(session_token: original_session).resolve
+
+    expect { visit project_contents_path(project) }.not_to raise_error
+    expect(page).to have_content("File Count\n0")
+
+    # a new session got automatically connected for the user in the application controller
+    expect(sponsor_user.mediaflux_session).not_to eq(original_session)
+  end
+end